Thread: Radiator Caps
View Single Post
  #2 (permalink)  
Old 09-29-2010, 06:38 AM
Archrms's Avatar
Archrms Archrms is offline
CC Member
Visit my Photo Gallery

 
Join Date: Aug 2006
Location: Jersey Shore, NJ
Cobra Make, Engine: Superformance SPF#2572, 427 S/O 2X4
Posts: 379
Not Ranked     
Default

I believe the caps without the second valve are used for over-flow type systems, where it lets coolant expand out of the system into an over flow tank, but does not allow the coolant back into the system. The caps with the second valve are used with recovery type systems which allows coolant to expand into a recovery tank, then return to the system as the engine cools down. Hope this helps.
__________________
Peace through superior firepower...or is it horsepower? Either way, more is always better!
Reply With Quote